Surface Area

7. Do you prefer to find the surface area ofa cylinder by using the sum of the area ofeach face or by using a formula? Give atleast two reasons for your choice.11. If each tennis ball has a diameter of 7 cm,calculate the amount of material needed tomake a can that holds three tennis balls.8. Anu wants to re-cover the cylindrical stoolin his bedroom. How much material doeshe need if there is no overlap?d = 42 cm32 cm9. Kaitlyn and Hakim each bought a tubeof candy. Both containers cost the sameamount. Which container required moreplastic to make?d = 7 cmd = 11 cmCANDY122 cmCANDY85 cm10. Paper towel is rolledaround a cardboardtube. Calculate theoutside surface areaof the tube.r = 2 cmEach personproduces about1.59 kg of trash eachday. Most of this ispaper products.12. Coins can be stored in a plastic wrappersimilar to a cylinder. A roll of dimescontains 50 coins. Each dime has adiameter of 17.5 mm and a thickness of1 mm. Calculate the minimum surfacearea of the plastic wrapper.13. A paint roller in the shape of a cylinderwith a radius of 4 cm and a length of21 cm is rolled vertically on a wall.a) What is the length and width of thewet path after ten complete rolls?b) What area does the paint cover?27.5 cmMATH LINKFor the cylindrical building you created in the MathLink on page XXX, how much material do you need tocover the exterior walls and the roof of the building?Douglas J. Cardinal, one of the world’s mostacclaimed architects, uses his European, Blackfoot,and Ojibwa roots when designing buildings. He isknown for his design of The Canadian Museum ofCivilization in Gatineau, Québec, as well as anumber of buildings in Western Canada, such asTelus World of Science in Edmonton and FirstNations University of Canada in Regina.5.4 Surface Area of a Cylinder • MHR 29